The CPF recovery file is a BDAM disk file that CPF uses to save transmitted commands until a response to those commands has been received from remote machines. Only commands selecting or defaulting to WAIT(NO) are saved for retransmission. Commands that are targeted only for the local machine are not saved.
When a TSS command with WAIT(NO) is entered, CPF saves a command image on the CPF recovery file before transmitting it over the link. When a response from the remote node is returned, CPF deletes the command from the file. If the response is not received (due to a link failure, a system being down, and so on), CPF scans the recovery file at the resumption of service, selects all commands that were not responded to, and retransmits those commands. When a response is eventually received, the command is deleted from the file.
CPF scans the recovery file at the following times:
Before you can use the recovery file, it must be formatted through TSSMAINT. The CPF recovery file must be defined to the CA Top Secret server virtual machine at address 600.
Important! The CPF recovery file cannot be shared across multiple systems.
If the CPF recovery file is not defined, command routing through CPF can still occur, but there will be no retransmission of commands that did not receive a response.
Note: For more information about defining the CPF recovery file, see the Installation Guide.
If the CPF recovery file becomes temporarily filled, a message goes to the system operator’s console each time CPF fails to write a message to the file. The CPF operation continues, but the unwritten command cannot be recovered if a failure occurs.
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